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A generalized moving-boundary model for transient simulation of dry-expansion evaporators under larger disturbances.

Author(s) : ZHANG W. J., ZHANG C. L.

Type of article: Article, IJR article

Summary

A generalized model based on the moving-boundary approach is developed to describe the transient behaviour of dry expansionevaporators in the vapour-compression refrigeration system. To improve the robustness of the traditional moving boundary model under larger disturbances, the time-variant mean void fraction is employed instead of the constant. Numerical integration is applied to get the mean properties in the two-phase region and the superheated region. The interface wall temperature between the two-phase and the superheated regions is also evaluated by a new weighted mean. Qualitative case study shows that the present model can well predict the transient behaviours of evaporators under larger disturbances and keep the robustness whenever superheated region appears or disappears.

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Pages: 1119-1127

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Details

  • Original title: A generalized moving-boundary model for transient simulation of dry-expansion evaporators under larger disturbances.
  • Record ID : 2006-2316
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 7
  • Publication date: 2006/11

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